Gearing for drilling-machines.



J. S. BARNES & J. R. VINGER. GEABING FOR DRILLING MACHINES.

APPLICATION FILED SEPT. 7, 1909. 979,91 8. Patented Dec. 27, 1910.

3 SHEETS-SHEET l.

J. S. BARNES & J. R. VINGER,

GEARING FOR DRILLING MACHINES. APPLICATION IILED SEPT. 7 1900.

979,918. Patented De0.27,1910.

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F M: J llll lmilll I ilk?! J. S. BARNES & J. R. VINGER.

GEARING FOR DRILLING MACHINES. APPLICATION IILED SEPT. 7, 1909.

Patented Dec.27,1910.

3 SHEETS-SHEET 3.

THE NORRIS PETERS ca, WASHINGTON, n. c.

which supports a drill spindle.

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JOHN S. BARNES AND JOHN R. VINCER, OF ROCKFORD, ILLINOIS, ASSIGNORS TOW. F. & JOHN BARNES COMPANY, OF ROCKFORD, ILLINOIS, A CORPORATION OFILLINOIS.

GEARING FOR DRILLING-MACHINES.

Specification of Letters Patent.

Application filed September 7, 1909.

T 0 all whom it may concern:

Be it known that we, JOHN S. BARNES and JOHN R. VINOER, citizens of theUnited States, residing at Rockford, in the county of Winnebago andState of Illinois, have invented certain new and useful Improvements inGearing for Drilling-Machines and the Like, of which the following is aspecification.

The object of this invention is to construct a drilling machine in whichthe drill spindle is rotated by a belt connection with a counter shaft,the drill spindle and countershaft being each provided with conepulleys, and pulleys over which the belt passes to give the propertension and alinement to the belt.

In the accompanying drawings Figure 1 is a side elevation of a drillingmachine containing our improvements. Fig. 2 is a plan view. Fig. 3 is asection on dotted line a Fig. 1. Fig. 4 is a vertical section on dottedline b Fig. 2. Fig. 5 is a section on dotted line 0 Fig. 1. Fig. 6 is asection on dotted line 65' d Fig. 1.

The column 1 has an overhanging head 2 A cone pulley comprising the twosteps 3 and 4 is supported by the overhanging head, and with which thedrill spindle 5 has a vertically sliding engagement. An arm 6 has asliding engagement with the column 1, and-supports a sleeve 7 throughwhich the drill spindle passes.

A table 16 has an adjustable connection with the column 1. To the column1 is bolted a bracket 17 which supports a driving-shaft 18, to thisdriving-shaft is fixedly connected a tight pulley 19, and a loose pulley20 is supported by this shaft. A cone pulley comprising the two steps 21and 22 is fixedly connected to this drivingshaft. The face 23 of thestep 21 next the step 22 is cone-shape, in order that the driving beltwill better transfer from the smaller step 22 onto the larger step 21.From the upper end of the column 1 extends a bracket 24 which supports abearing 25.

A rod has a section 26 located in the bearing 25 in a manner to rotatetherein. This rod has a crank portion 27 and an ofiset section 28extending parallel with the section 26. The section 26 of this rod isheld against lengthwise movement by the collar 29 located adjacent toone end of the bearing 25, and a worm wheel 30 located adjacent theother end of the bearing. The collar and worm wheel are fixedlyconnected to the section 26 of the rod.

A bearing 31 extends from the bracket 24, and a shaft 32 is supported bythis bracket, a worm 33 is secured to one end of the shaft 32 and mesheswith the wormwheel 30. A hand wheel 34 is secured to the other end ofthis shaft 32. By means of the hand wheel 34 the rod can be rotated andthrough the worm and worm wheel connection the rod will be held at restin any position into which it may be adjusted. Owing to the crankportion 27 of the rod, the section 28 thereof will swing in a circle.

A sleeve 35 is mounted on the section 28 of the rod in a manner toreciprocate thereon. To the sleeve 35 are pivoted two yokes 36 and 37,and pulleys 38 and 39 are supported by the yokes. A spring 40 surroundsthe crank portion 27 of the rod, one end resting against the worm wheel30 and the other end against the sleeve As shown in the drawings, a belt41 is passed around the step 3 of the cone pulley. driving the drillspindle, over the pulleys 38 and 39 and around the step 21 of the conepulley attached to the driving-shaft. The driving-shaft 18 is rotated bya belt connecting the pulley 19 with the main line shafting or othermotive power. The spring 40 exerts its force against the sleeve 35 whichwill tend to force it along the section 28 of the rod, thereby acting asa belt tightener. When the belt is in the position shown in the drawingsthe section 28 of the rod will be in the position shown in dotted linesFig. 3, which is to one side and below the center of the section 26 ofthe rod, and over the step 3 of the cone pulley connected to thedriving-shaft. The pulleys 38 and 39 supported by the yokes 36 and 37will adapt themselves so that the belt will be in proper I driving thedrill spindle, to the upper step 4 thereof, and as this step is of lessdiameter than the step 3, slack will be had in i this step 22 is smallerthan the step 21, the

spring 40 will move the sleeve 35 carrying the pulleys 38 and 39 fartheralong the section 28 of the rod, and take up the slack. By moving thesection 28 of the rod so that it will occupy the position shown bydotted lines 44 Fig. 3, the belt may be shifted from the step 4 of thecone pulley driving the drill spindle onto the step 3 of the samecone-pulley, and as this step 3 is larger than the step 4, thespring 40will yield and allow the belt to extend over the larger pulley. By themovement of the rod in the four positions indicated on Fig. 3, fourdifferent speeds will be imparted to the drill spindle. After the belthas been shifted, the sleeve 35 is held against movement in connectionwith the section 28 of the rod by the setscrew 45, in order that thepulleys supported by the sleeve will not yield under the straintransmitted by the belt. The cone-pulley connected with the countershaft is held against bodily movement in the lengthwise direction of theshaft, and the belt is transferred from one step of the cone-pulley ontothe other step by the oscillations of the rod carrying the sleevesupporting the swiveled pulleys 38 and 39.

We claim as our invention:

1. In mechanism of the character described, the combination with drivingand driven members, of a power-transmitting belt connecting the same, arotatable crank member, means for rotating and holding the crank memberin different positions, and

a belt-engaging element mounted on the crank member.

2. In mechanism of the character described, the combination with drivingand driven members, of a power-transmitting belt connecting the same, asupport, a shaft journaled on the support and having an offset crankelement, and a belt-engaging element mounted on the crank element.

3. In mechanism of the character set forth, the combination with asupporting frame, of driving and driven members thereon, a beltconnecting the members, a

v shaft having one end journaled on the suportin frame and havin itsother end offset, and a belt engaging pulley carried by the offset endof the shaft.

4. In mechanism of the character disclosed, the combination with asupporting frame, of driving and driven members there- 'on, a beltconnecting the members, a shaft having one end journaled on thesupporting frame and having its other end offset, a belt engaging pulleycarried by the offset end of the shaft, a worm wheel carried by theshaft, and an actuating and holding worm meshing with the worm wheel.

5. In mechanism of the character set forth, the combination with drivingand driven members, of an endless belt connecting the same, a supportingrod, a sleeve slidable on the rod, a pair of idler pulleys swiveled uponthe sleeve, and a coiled spring surrounding the rod and bearing againstthe sleeve.

6. In mechanism of the character set forth, the combination with aframe, of a support rotatably mounted thereon, driving and drivenmembers, a power-transmitting belt connecting the members, and a deviceengaging the belt between the driving and driven members and adjustablymounted on the rotatable support.

7. In mechanism of the character set forth, the combination with aframe, of a support rotatably mounted thereon and having a crankportion, driving and driven members, a power-transmitting beltconnecting the members, and a device engaging the belt between thedriving and driven members and capable of reciprocatory movement on thecrank portion.

8. In mechanism of the character set forth, the combination with aframe, of a support rotatably mounted thereon, driving and drivenmembers, a power-transmitting belt connecting the members, a device en,-gaging the belt between the driving and driven members and adjustablymounted on the rotatable support, and means for -ad justably securingsaid device on the support. to maintain the belt taut.

9. In mechanism of the character set forth, the combination with asupporting frame, of a support rotatably mounted thereon and having acrank portion, driving and driven members, a power transmitting beltconnecting the members, a device engaging the belt between the drivingand driven members and capable of reciprocatory move ment on the crankportion of the support, and a spring bearing against the device formoving it on the support.

10. In mechanism of the character set forth, the combination with asupporting frame, of angularly disposed driving and driven membersjournaled thereon, a belt connecting the driving and driven members, arod rotatably mounted on the frame and having a crank portion, a sleeveslidable on the crank port-ion, idler pulleys swiveled on the sleeve andengaging the belt, a spring coiled upon the rod and bearing against thesleeve, a worm wheel carried by the rod, and an actuating shaft having aworm engaging the worm wheel.

11. In mechanism of the character disclosed, the combination withangularly disposed driving and driven shafts, of a cone pulley carriedby each shaft, a belt connection between the pulleys, a movable guidepulley engaging the belt between the cone pulleys, a laterally shiftablesupport for the guide pulley, means for shifting the support to causethe' guide pulley to shift the belt to different positions on a conepulley, and yielding means for automatically preventing slack in thebelt when so shifted.

12. In mechanism of the character dis closed, the combination withangularly disposed driving and driven shafts, of a cone pulley carriedby each shaft, a belt connection between the pulleys, a movable guidepulley engaging the belt between the cone pulleys, a laterally andlongitudinally shiftable support for the guide pulley, means forshifting the support in one direction and holding it in differentpositions to cause the guide pulley to shift the belt on one of the conepulleys, and yielding means bearing against the support to automaticallyshift said support in another direction to prevent slack in the beltwhen shifted.

13. In mechanism of the character dis closed, the combination withangularly disposed driving and driven shafts, of a cone pulley carriedby each shaft, an endless belt connecting the pulleys, a pair of guidepulleys, a support for the guide pulleys, means for shifting the supportto cause the belt to shift on either cone pulley without shifting on theother cone pulley, and means for automatically moving the support toprevent slack of the belt when shifted.

14. In a drilling machine, the combination of a frame, a spindle, apulley connected with the spindle, a counter-shaft, a pulley connectedwith the counter-shaft, a belt connection between the pulleys, asupport, a sleeve slidable on the support, two pulleys supported by thesleeve over which the belt passes, and a spring acting against thesleeve to hold the belt taut.

15. In a drilling machine, the combination of a frame, a spindle, apulley connected with the spindle, a counter-shaft, a conepulleyconnected with the counter-shaft, a belt connecting the pulley on thespindle and the cone-pulley, an oscillatory support, two pulleyssuspended from the support, and

'means for oscillating the support to move the pulleys to locate thebelt over either of the steps of the cone-pulley and hold it whenadjusted.

16. In a drilling machine, the combination of a frame, a spindle, apulley connected with the spindle, a counter-shaft, a conepulleyconnected with the counter-shaft, a belt connecting the pulley on thespindle and the cone-pulley, an oscillatory support having a crankedextension, means for oscillating thesupport and holding it whenadjusted, two swiveled pulleys suspended from the cranked portion of thesupport over which the belt passes.

17 In a drilling machine, the combination of a frame, a spindle, apulley connected with the spindle, a counter-shaft, a conepulleyconnected with the counter-shaft, a belt connecting the pulley. on thespindle and the cone-pulley, an oscillatory support having a crankedextension, means for oscillating the support and holding it whenadjusted, a sleeve mounted on the extens1on, a spring acting on thesleeve, and two swiveled pulleys supported by the sleeve over which thebelt passes.

18. In a drilling machine, the combination of a frame, a spindle, apulley connected with the spindle, a counter shaft, a cone pulleyconnected with the counter-shaft, a belt connecting the pulley on thespindle and the cone-pulley, an oscillatory support having a crankedextension, a worm wheel connected to the support, a worm meshing withthe worm wheel, means for turning the worm, a sleeve mounted on theextens on, a spring. action on the sleeve, two swiveled pulleyssupported by the sleeve over which the belt passes, and means forclamping the sleeve to its support.

In testimony whereof we have hereunto set our hands in presence of twosubscribing witnesses.

JOHN S. BARNES. JOHN R. VINOER.

Witnesses:

E. J. BRYDEN, A. O. BEHEL.

